| 1931 HUGHES KEENAN CO End Gate Dump Wagons Trucks |
| 1931 FORT Three Way Dump Vehicle Patent Print |
| 1931 EUCLID CRANE HOIST Dump Wagon Door Operating Gear |
| 1931 STREICH Dump Body Door Operating Mechanism |
| 1931 HIGHWAY TRAILER CO Gravity Dump Vehicle Art |
| 1931 CURZON JOHN Dump Car JOSEPH KASTLIC Patent |
| 1931 HOSCEIT Latch For Dump Car Doors Patent |
| 1931 GALION METALLIC VAULT Dump Truck Art Print |
| 1931 GALION METALLIC VAULT Dump Body Art Print |
| 1931 GENTRY Roller Dump Body For Trucks Patent |
| 1931 SMITH RALPH Dump Truck Patent Print Art |
| 1931 LARSON Tail Gate Dump Trucks Art Print |
| 1931 GORSUCH End Gate Dump Wagons Trucks Art |
| 1931 ARMINGTON Dump Wagon Door Operating Gear |
| 1931 SMITH RALPH Dump Body GALION METALLIC VAULT |
| 1931 WILLIAMS Gravity Dump Vehicle Patent Print |
| 1931 ANDREW GERMEK Dump Car Doorlock Patent |
| 1931 WINTER Combined Hinge Lock Dump Bodies Art |
| 1931 ORSON F BAKER PRESTON UPDIKE Dump Body Trucks |
| 1931 STREICH BRO A Dump Wagon Door Operating |
| 1931 JONES CLARENCE Dump Vehicle Patent Print |
| 1931 JOSEPH KASTLIC Dump Car Patent Print Art |
| 1931 RODGER BALLAST CAR Latch Dump Car Doors |
| 1931 PRESSED STEEL CAR CO Dump Car Patent Print |
| 1931 SHERBURNE Dump Body For Trucks Patent Print |
| 1931 KANTENWEIN OSCAR Dump Car Patent Print Art |
| 1931 STREICH Dump Wagon Door Operating Art |
| 1931 WOOSTER Combined Loading Dump Car Art Print |
| 1931 Western Dump Cars Ad RI, ARR, Milw, D&SL... |
| 1931 Linn Mfg Corp,Linn Shovel ad & 1/2 track dump,ID'd |